[fine] More resilience

We don't lose function declarations and whatnot, although we get lost
with broken return types.

fine/tests/expression/errors/wild_member_access.fine

@@ -17,6 +17,5 @@ fun test() {
 // matklad talks about in his resilient parser article.
 //
 // @expect-errors:
-// | 7:12: Error at '{': expected an expression
+// | 7:12: Error at '{': expect ';' to end a let statement
 // | 7:26: cannot find value foo here
-// | 8:0: Error at '}': unbalanced '}'